马蔺2个种源播种育苗试验初报

对甘肃高台、内蒙古阿拉善右旗马蔺2个种源播种苗株高、叶宽、产苗量等指标进行观测,结果表明,马蔺在土壤0～60 cm全盐17.4 g/kg、pH8.7的圃地播种繁育出苗较好,667 m2播种量7.5 kg产苗量8万株左右,阿右旗种源单位面积产苗量大于高台种源;5～7月为马蔺快速生长期,苗高、叶宽、地上部分鲜质量高台种源大于阿右旗种源;播种苗第1年不分蘖,第2年平均分蘖3株,分蘖于早期生长时完成;马蔺抗旱、抗寒、耐高温、耐盐碱,绿期250 d左右。     

鸢尾新品种‘黄玉’

 ‘黄玉’是从路易斯安那鸢尾‘Ann Chowning’自交后代优良单株中选育出的新品种，属常 绿、湿生、耐寒型，花黄色，繁殖率高。高70 cm 左右，冠幅近50 cm。花色为交通黄（RAL1023）；单 葶花朵平均4.5 个；移栽第1 年平均分蘖为8.4 倍。淮河流域以南地区一年四季都可以湿地栽培。     

路易斯安娜鸢尾在苏州地区的引种与结实性研究

对引进路易斯安娜鸢尾品种的生长习性、开花特性与结实率等进行了观察测定。结果表明:9个品种在苏州地区有良好的适应性;在花茎高度、花径、叶宽等性状方面保持品种各自稳定性。而品种间在花期、花色、花茎高度等方面的差异在园林应用中可配置在不同的花坛、花境、湖岸坡地来丰富湿地景观。各品种在苏州的天然结实率低,通过人工辅助自交授粉将8个品种的结实率不同程度提高了20%~60%。     

The effect of management and ecological factors on the epidemiology of anaplasmosis in the Red River Plains and south-east areas of Louisiana

The relationship between clinical anaplasmosis and other disease morbidity, nutritional supplementation, vaccinations, external and internal parasite control, tetracycline supplementation, reproductive management and use of veterinary services was assessed in 320 beef cow-calf herds in the Red River Plains and south-east areas of Louisiana. Data were collected both by mailed questionnaires and by interviews with owners who reported the presence or absence of clincal anaplasmosis. A relationship was found between other disease conditions and anaplasmosis, suggesting diseasse as a stressor in Anaplasmosis marginale carrier cattle. The herd location of A. marginale seropositive animals and clinical cases of anaplasmosis were related to areas of bottomland hardwood vegetation in which tabanid flies were abundant. This relationship with vegetation was tested by mapping the location of 209 beef and dairy herds which had been serologically tested for anaplasmosis and 256 cases of clinical anaplasmosis in 113 beef and dairy herds.     

基于ITS序列的鸢尾属植物部分种的系统分类

通过引物设计、PCR、基因克隆、测序,获得了10种鸢尾属植物和1个外类群种的ITS序列。鸢尾属植物ITS1区长度219~243bp,5.8S序列长度均为165bp,ITS2区长度变异范围为196~239bp。5.8S序列过于保守,保守位点占81.9%。ITS序列对于区分鸢尾属植物组级的较大分类等级较好。用近缘属射干属的Belamcandachinensiss作为外类群,用邻位相接法(NJ)和最大简约法(MP)进行聚类分析,得到了较一致的系统树,且分析表明,ITS序列对于建立属间的分类等级更加有效。结合Genebank中的中国鸢尾属植物的序列,比较支持赵毓棠建立的中国鸢尾属植物组以上的分类系统。     

新疆喜盐鸢尾化学成分预试及薄层色谱分析

探讨喜盐鸢尾(Iris halophila)的化学成分,并建立起各萃取部分指纹图谱。采用植物化学成分系统预试法、薄层色谱分析技术及平面色谱图像定量法对喜盐鸢尾化学成分进行分析。结果显示,喜盐鸢尾含有生物碱、有机酸、酚类、鞣质、黄酮、蒽醌、皂甙、香豆素、挥发油及三萜类化合物,不含有强心甙、氰甙和脂肪族硝基化合物。其石油醚、氯仿、乙酸乙酯和正丁醇萃取相中至少含有9、7、9和6种化合物,经与标准品对照,乙酸乙酯相中含有鸢尾苷;各萃取相中相对含量最高的斑点依次为2、5、6和4。喜盐鸢尾化学成分主要集中在石油醚和乙酸乙酯萃取部分。喜盐鸢尾含有丰富的活性成分,具有一定的药用价值。     

6个球根鸢尾园艺品种在武汉地区引种适应性研究

对6个球根鸢尾园艺品种在武汉地区的栽培适应性进行了5年连续观察研究,观察了气候因子对球根鸢尾的生长的影响;并对其不同品种的长势、开花习性与特征等进行了观测,分析了不同品种的子球萌发率与开花情况。结果表明：球根鸢尾能很好的适应武汉地区的露地栽培;其中,阿波罗、电子星与布朗教授三个品种生长发育良好,子球萌发与开花率在2016年以后逐年恢复;布朗教授在2019年恢复正常开花至90%以上。为球根鸢尾在武汉地区的栽培应用提供了参考。     

黄花鸢尾对富营养化水体净化的试验研究

利用黄花鸢尾(Irispseudoacorus)对含盐和氮磷较高的水体进行富营养化控制研究。结果表明,黄花鸢尾对于总氮、亚硝酸盐、硝酸盐等营养盐有较好的去除效果,水体中的硝酸盐变化趋势与溶解氧相同,氨氮变化趋势与溶解氧相反。黄花鸢尾可以有效地控制水中的叶绿素a,种植黄花鸢尾的水体中叶绿素a仅为对照的1/168,说明黄花鸢尾可以有效抑制藻类的繁殖生长。同时,种植黄花鸢尾能抑制水体pH值的提高,降低盐度,提高透明度,对改善水质有很好的效果。黄花鸢尾对营养盐的去除主要是通过植物根际微生物的作用。通过MPN(mostprobablenumber)法测定黄花鸢尾植物群落的分布可以看出,其根际的氮循环菌最为密集,由根际向外呈递减趋势。     

Histomorphometric analysis of the irides of dogs, camels, buffalos and donkeys

The present study was carried out to investigate the morphological and histomorphometrical characters of irides in dogs, camels, buffalos, and donkeys. The findings of the study revealed that, morphologically, the irides were consisted of an anterior border layer, a middle layer of connective tissue stroma and a posterior layer of pigmented epithelium. Interestingly, the anterior borders of all investigated animals were not enveloped by a distinct epithelial or endothelial lining, but on contrary, the posterior border was covered by pigmented epithelium. The constrictor and dilator iridial muscles were well developed in dogs, weakly developed in donkeys, and with an intermediate position in camels and buffalos. Morphometric analysis revealed significant species differences in the mean total thickness of the iris and its different layers. In addition significant differences were also found between the ratio of the means of different layers to the total thickness of the iris at the pupillary, middle and ciliary borders. In conclusion, these variations might be related to the different lifestyles and visual behaviour of the investigated animals.     

Serials Redesign: Using Electronic Document Delivery to Reshape Access to Agricultural Journal Literature

ABSTRACT

In response to financial pressures resulting from escalating serials prices and severe budget constraints, LSU Libraries have launched a complete and comprehensive evaluation and redesign of its serials collection. The Serials Redesign Project is an innovative approach to the serials review process using electronic document delivery to facilitate the integration of access and ownership. Library liaisons help promote faculty acceptance and support, which will be crucial to the success of the project. Background information, the project methodology, faculty responses, and preliminary results for two pilot studies and for the Agriculture departments are presented.